JP2013163626A - Cut line processing apparatus for plate-shaped substance and cut line processing method for plate-shaped substance, and manufacturing apparatus for glass sheet and manufacturing method for glass sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cut line processing apparatus for a plate-shaped substance and a cut line processing method for the plate-shaped substance to cut and process the plate-shaped substance with high dimensional accuracy, and to provide a manufacturing apparatus for a glass sheet and a manufacturing method for the glass sheet.SOLUTION: A transversely cut line 40 is processed on a surface of a band glass sheet G under transportation by a cutter 20, the band glass sheet G is cut by an a device 52 by being folded along the transversely cut line 40, a cut periphery 54 is photographed by an electronic still camera 42, perpendicularity of the photographed cut periphery 54 to a transportation direction A of the band glass sheet G is calculated, and the running speed of the cutter 20 is controlled by a controller 24 so that the perpendicularity is within an allowable value. Alternatively, the perpendicularity of the transversely cut line 40 to the transportation direction A of the band glass sheet G is calculated and the running speed of the cutter 20 is controlled by the controller 24 so that the perpendicularity is within an allowable value.

Description

  The present invention relates to a cutting device for a plate-like material, a cutting method for a plate-like material, a manufacturing device for a glass plate and a manufacturing method for a glass plate.

  As a manufacturing method of a glass plate used for an FPD (Flat Panel Display) glass substrate, an architectural glass plate, etc., a manufacturing method called a float method disclosed in Patent Document 1 is known. In this float process, molten glass is poured onto tin in a molten tin bath, the molten glass is spread over the tin to an equal thickness, a glass ribbon is formed, and finally a strip having a predetermined thickness. This is a method of forming into a glass plate.

  The strip-shaped glass plate formed in the molten tin bath is drawn out to a slow cooling section installed on the downstream side of the molten tin bath, cooled to a predetermined temperature (room temperature), and then transported by a roller conveyor or the like. It is continuously conveyed to a cutting and folding device and cut into a glass plate of a desired size. The cut glass plate is transported to a predetermined storage section by a roller conveyor, where it is stored one by one on a pallet or the like and taken out as a product or an intermediate product.

  The cutting and folding apparatus disclosed in Patent Document 2 is installed on the downstream side in the conveyance direction, and the cutting line processing apparatus (also referred to as the breaking line processing apparatus or the cutting line processing apparatus) installed on the upstream side in the conveyance direction of the belt-shaped glass plate. And the folded device. Further, the severing device is composed of a vertical slicing machine installed on the upstream side in the transport direction of the belt-shaped glass plate and a horizontal slicing machine installed on the downstream side thereof, such as a wheel cutter of the vertical slicing machine, etc. A vertical cutting line parallel to the transport direction of the strip-shaped glass plate is processed on the surface of the strip-shaped glass plate by a cutter, and a transverse plane perpendicular to the transport direction of the strip-shaped glass plate is cut downstream by a cutter such as a wheel cutter of a horizontal cutting line processing machine. Cut the cut line on the surface of the glass strip.

  The cutter for processing the transverse cut line is supported by a guide frame so as to be able to travel. The guide frame is downstream in the transport direction with respect to the direction perpendicular to the transport direction of the belt-shaped glass sheet transported at the transport speed v. Is arranged in a posture inclined at an angle θ. The cutter is travel controlled at a speed w (w = v / cos θ) along the guide frame by a drive unit such as a servo motor. As a result, a transverse line perpendicular to the transport direction is processed on the surface of the belt-shaped glass plate by the cutter.

  The slicing method using the cutter is a method called cutting with different sizes, and is performed for the purpose of collecting a plurality of glass plates having different sizes from a strip-shaped glass plate that has been gradually cooled in a slow cooling section at once without waste. ing. In this cutting method, a plurality of vertical cutting machines are arranged side by side, and a horizontal cutting machine is installed downstream of the vertical cutting machines, and the cutting / cutting operation of the cutters of each cutting machine is controlled. (For example, motion control synchronized with the conveyance speed of the belt-shaped glass plate), by which a cutting line for picking a plurality of glass plates of a desired size from the belt-shaped glass plate being transported is processed into a belt-shaped glass plate. .

  In the cutting process for cutting different sizes, it is necessary to precisely control the cutting start timing of the cutter, and for this purpose, the conveyance speed of the strip glass plate is detected. As the transport speed detection device, there is a transport amount detection device that detects a transport speed based on a rotation amount of the roller that contacts a belt-shaped glass plate being transported and rotates following the transport of the belt-shaped glass plate. Are known.

  The transport amount detection device detects the rotation amount of the roller by an encoder, and counts the number of pulses output from the encoder by a pulse counter. Then, when the counted number of pulses reaches a predetermined number of pulses stored in advance as the cutting line processing start time, the control unit controls the driving unit of the cutter so as to start the cutting line processing by the cutter.

  The roller includes a metal roller main body and a rubber or resin sheet lining the outer peripheral surface of the roller main body. This sheet serves as a cushioning material so as not to be damaged by the roller coming into contact with the surface of the belt-shaped glass plate.

JP-A-8-277131 WO2008 / 136239

  However, in the conventional transport amount detection device, the roller thermally expands and contracts according to the change in the ambient temperature, and the diameter and angular velocity of the roller change. For this reason, since the rotation amount of the roller fluctuates, it is difficult to accurately detect the conveyance speed v of the plate-like object.

  Therefore, even if the cutter speed w is controlled as described above (w = v / cos θ), there is a problem in that a transverse line perpendicular to the conveying direction cannot be processed on the surface of the belt-shaped glass plate. That is, since the actual transverse line is inclined with respect to a predetermined transverse line orthogonal to the conveyance direction, the perpendicularity of the actual transverse line with respect to the conveyance direction of the belt-shaped glass plate may deviate from the allowable value.

  The perpendicularity is defined in the machine tool-test and inspection terms in JIS B 0182 (established in 1993). The perpendicularity described in the present specification is defined as one of the two lines defined in the above definition as a line along the transport direction of the belt-shaped glass plate and the other line as an actual transverse line. The squareness.

  The present invention has been made in view of such circumstances, and a plate-like material cutting device, a plate-like material cutting method, and a glass plate manufacturing method capable of cutting and cutting a plate-like material with dimensional accuracy. An object is to provide an apparatus and a method for producing a glass plate.

  In order to achieve the above object, the present invention causes the cutting line processing means and the cutting line processing means to travel on the surface of the plate-like object in a direction inclined by a predetermined angle with respect to the conveyance direction of the plate-like object being conveyed. A driving means for processing a cutting line on the surface of the plate-like object, a cutting means for cutting the plate-like object along the cutting line, and a shape of the plate-like object cut by the cutting means, or The shape detection means for detecting the shape formed by the cut line of the plate-like object cut by the cutting line processing means, the shape of the plate-like object detected by the shape detection means, or the cut line of the plate-like object Based on the shape to be formed, calculating means for calculating the perpendicularity of the cutting edge of the plate-like object or the perpendicularity of the cutting line of the plate-like object with respect to the conveying direction of the plate-like object; The perpendicularity is within the tolerance Providing tangential machining apparatus of the platelet, characterized in that it comprises a control means for changing the traveling speed of the cut line processing means by controlling the drive means so that the.

  In order to achieve the above-mentioned object, the present invention is configured by causing a cutting line processing means to travel on the surface of the plate-like object by a driving means in a direction inclined by a predetermined angle with respect to the conveying direction of the plate-like object being conveyed. A cutting process for cutting a cut line on the surface of the plate-like object, a cutting step for cutting the plate-like article along the cut line by a cutting means, and a shape of the plate-like article cut by the cutting means Or a shape detection step of detecting a shape formed by the cut line of the plate-like object cut by the cutting line processing means, and a shape of the plate-like object detected by the shape detection step, or of the plate-like object A calculation step of calculating a squareness of a cutting side of the plate-like object or a squareness of the cutting line of the plate-like object with respect to a conveying direction of the plate-like object, based on a shape formed by the cut line; Calculated by And a speed control step of changing the traveling speed of the slicing means by controlling the driving means by a control means so that the degree falls within an allowable value. I will provide a.

  According to the present invention, the shape detection means (shape detection step) detects the shape of the plate-like object or the shape formed by the cut line, and calculates the perpendicularity of the cut side or the cut line with respect to the conveying direction of the plate-like object ( Calculation step). When the calculated squareness is out of the allowable value, the driving means is controlled by the control means (speed control step) so as to change the traveling speed of the slicing means so as to fall within the allowable value.

  That is, according to the present invention, the speed of the cutting means is feedback controlled based on the actual cutting edge or the perpendicularity of the cutting line with respect to the conveying direction of the plate-like object. Thereby, according to this invention, since the cut line orthogonal to the conveyance direction of a plate-shaped object can be processed on the surface of a plate-shaped object, a plate-shaped object can be cut and cut with sufficient dimensional accuracy.

  The permissible value is a value according to the product standard of a plate-like product that is cut along a cutting line and commercialized. If the perpendicularity is within the allowable value, it is assumed that a cut line perpendicular to the conveying direction of the plate-like object has been processed.

  The shape detection means of the present invention is an image pickup means for picking up an image of the plate-like object, and the calculation means is based on the image information of the plate-like object picked up by the image pickup means, or the cutting edge or the cut line. It is preferable to calculate the squareness of.

  In the shape detection step of the present invention, the plate-like object is imaged by an imaging unit, and the calculation step is performed based on the image information of the plate-like object imaged by the imaging unit. It is preferable to calculate the squareness.

  In the present invention, an imaging unit is illustrated as the shape detection unit. This image pickup means includes an image pickup element such as a CCD or CMOS for picking up an image of a plate-like object. The image processing unit that performs image processing on an image picked up by the image pickup device includes a calculation unit. The image processing unit is configured by a microcomputer including, for example, a CPU, a RAM, and a ROM. In addition, the image processing unit detects the shape (cutting edge, cutting line) and size of the plate-shaped object by performing image processing on the image captured by the image sensor and identifying the location where the brightness of the image changes abruptly. To do.

  Moreover, the following means are also illustrated as a shape detection means. For example, a laser displacement meter or a contact type linear gauge sensor can be used. The laser displacement meter can detect the edge of the cut plate-like object and detect the shape of the plate-like object as long as it is a type of sensor that transmits the sheet-like laser light and detects the light amount of the light receiving part. . When the shape detection means is a sensor, it is difficult to detect the shape of a cut or cut-lined plate-like object, so a total of eight sensors are arranged on each side of the plate-like object. It is preferable to detect the four corners of the plate-like object and detect the shape of the plate-like object from the four corners. This is because in the case of the sensor, it is not captured by an area but by a point or a line. That is, since the sheet-shaped laser beam cannot detect the corner portion of the plate-like object itself, two points of one edge of the plate-like object are detected using two sensors for one side of the plate-like object. A straight line passing through two points is obtained from two points, and a corner portion of the plate-like object is obtained from a virtual intersection of two adjacent straight lines. Therefore, two sensors, one for each side of the plate-like object, are required.

  Moreover, this invention provides the manufacturing apparatus of the glass plate characterized by including the cutting apparatus for cutting the plate-shaped object of this invention, in order to achieve the said objective.

  Moreover, this invention provides the manufacturing method of the glass plate characterized by providing the cutting method of the sheet-like thing of this invention, in order to achieve the said objective.

  According to the glass plate manufacturing apparatus and the glass plate manufacturing method of the present invention, the glass plate can be cut and cut with high dimensional accuracy.

  Note that Patent Document 2 and Japanese Patent Application Laid-Open No. 2009-107897 describe that the cutting line perpendicular to the conveyance direction of the plate-shaped object is processed by running the cutting line processing means in synchronization with the conveyance speed of the plate-shaped object. There is. On the other hand, the present invention provides feedback control of the speed of the cutting means based on the perpendicularity of the cutting edge and the cutting line with respect to the conveying direction of the plate-like object, and the cutting line perpendicular to the conveying direction of the plate-like object is formed on the plate. It is an invention to process on the surface of the object. Therefore, it is added that Patent Document 2 and Japanese Patent Application Laid-Open No. 2009-107897 do not describe the features of the present invention.

  According to the cutting device and the cutting method for a plate-like material of the present invention, as well as the glass plate manufacturing device and the glass plate manufacturing method, the plate-like material and the glass plate can be cut and cut with high dimensional accuracy.

The perspective view which showed the principal part of the cutting line processing apparatus which concerns on embodiment Plan view of the slicing apparatus shown in FIG. The block diagram which showed the structure of the cutting line processing apparatus of embodiment Explanatory drawing which showed the cutting | disconnection edge part imaged with the electronic camera The perspective view of the cutting line processing apparatus of other embodiment Plan view of the cutting apparatus shown in FIG.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a sheet cutting device and sheet cutting method, a glass plate manufacturing apparatus, and a glass plate manufacturing method according to the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing a main part of a cutting device 10 for a glass strip (plate) G to which a cutting device for a plate-like material according to an embodiment is applied. FIG. 2 is a plan view of the slicing apparatus 10 shown in FIG.

  A cutting line processing apparatus 10 shown in FIGS. 1 and 2 is installed on the upstream side in the conveying direction of the band-shaped glass sheet G, from a band-shaped glass sheet manufacturing apparatus (not shown) by a float method equipped with a molten glass manufacturing apparatus. 12 is a slicing apparatus corresponding to a slicing process called so-called different size slicing, in which a vertical slicing line and a horizontal slicing line are processed on the belt-like glass plate G continuously conveyed in the direction of arrow A by 12.

The glass plate manufacturing method by the glass plate manufacturing apparatus of the embodiment to which the embodiment is applied includes the glass melting step by the molten glass manufacturing apparatus, the molding step of forming the molten glass into a strip glass plate, and the strip shape A slow cooling process for gradually cooling the glass plate, a cutting step for cutting the strip glass plate along the cutting line while processing the cut line by the cutting line processing apparatus of the embodiment, a chamfering step for chamfering the edge of the cut glass plate, A polishing step of polishing the principal surface of the chamfered glass plate, and a packing step of packing the polished glass plate. In addition, when the glass plate to be packed is an intermediate product, the chamfering process and the polishing process are not performed, and the cutting line processing apparatus 10 that moves from the cutting process to the packing process is provided with a conveyance amount detection apparatus 100. ing. The transport amount detection device 100 includes a roller 102 that is in contact with the surface of the strip-shaped glass plate G and rotates following the transport of the strip-shaped glass plate G. The operation of each cutter of the slicing apparatus 10 is basically controlled based on the transport amount (transport speed v) of the band-shaped glass plate G detected by the transport amount detection device 100. However, it is difficult to accurately detect the actual conveyance amount (conveyance speed v) by the conveyance amount detection device 100 as described above, and the slicing apparatus 10 according to the embodiment solves such a problem. . This will be described later.

The downstream side of the belt-like glass plate G of the cut line processing device 10, is folding device 52 is installed, the subsequent folding device 52, the glass plate G _A cut by the folding device 52, according to the size housing A roller conveyor (not shown) for sorting and transporting and picking plates is installed in the section.

The transport amount detecting apparatus 100, the band-shaped glass plate manufacturing apparatus, the roller conveyor, the folding device 52, and the roller conveyor for Toita to sorting conveyor in the housing portion of the cut glass sheet G _A, and using the same The apparatus for producing a strip-shaped glass plate is as known in the art. Moreover, the strip-shaped glass plate G of embodiment may be used for the glass substrate for FPD, and is used for the glass plate for solar cells, the glass plate for illumination, the glass plate for construction, or the glass plate for automobile windows. It may be used. Furthermore, the target plate-like object is not limited to the belt-like glass plate G, and may be a rectangular glass plate. The material of the plate-like object is not limited, and the cut line processing apparatus 10 according to the embodiment can be used as long as it is a resin-made or metal plate-like object and the cut line is processed while being continuously conveyed. Applicable. Furthermore, the manufacturing apparatus of the strip glass plate G is not limited to the manufacturing apparatus by the float process, and may be another manufacturing apparatus such as a fusion method.

  Moreover, although the cutting line processing apparatus 10 of embodiment is an apparatus which performs different size cutting, it is not limited to different size cutting. That is, if it is a slicing apparatus that can improve the dimensional accuracy of the glass sheet in the conveying direction A of the strip-shaped glass sheet G, a slicing apparatus that processes only the so-called horizontal section line on the surface of the strip-shaped glass sheet G (in FIG. 1). The present invention can also be applied to a cutting line processing apparatus provided with only the horizontal cutting line processing machine 16. Therefore, the slicing apparatus 10 that performs different size cutting is merely an example.

  The severing device 10 includes a vertical slicing machine 14 installed on the upstream side in the transport direction of the belt-shaped glass plate G, and a horizontal slicing machine 16 installed on the downstream side in the transporting direction. A vertical cutting line parallel to the conveying direction of the band-shaped glass sheet G is processed into the band-shaped glass sheet G by the vertical cutting line processing machine 14, and a horizontal cutting line orthogonal to the conveying direction of the band-shaped glass sheet is formed downstream by the horizontal cutting line processing machine 16. It is processed into a strip-shaped glass plate G.

  The vertical cutting line processing machine 14 includes a plurality of cutters 18, 18... Installed in the width direction of the belt-shaped glass plate G. These cutters 18, 18... Are moved forward and backward by a well-known advance / retreat means with respect to the belt-shaped glass plate G being conveyed by the roller conveyor 12, and are pushed and moved to press the belt-shaped glass plate G with a predetermined pressing force. Is done. Thereby, a longitudinal cut line parallel to the conveying direction of the band-shaped glass plate G is processed into the band-shaped glass plate G.

  On the other hand, the horizontal cutting line processing machine 16 includes a single cutter (cutting line processing means) 20. The cutter 20 is supported by a guide frame 26 installed above the transport path of the belt-shaped glass plate G so that the guide frame 26 is inclined at a predetermined angle with respect to the transport direction A of the belt-shaped glass plate G. Are arranged. When the cutter 20 is run obliquely with respect to the transport direction of the strip glass plate G in synchronization with the transport speed of the strip glass plate G, a horizontal cut line (cut line) in a direction perpendicular to the transport direction of the strip glass plate G is formed. It is processed on the surface of the band-shaped glass plate G. The speed control of the cutter 20 that is a feature of the present invention will be described later.

  FIG. 3 is a block diagram illustrating a configuration of the slicing apparatus 10 according to the embodiment. As shown in the figure, the servo motor 22 (driving means) that drives the cutter 20 is motion-controlled by a control device (control means) 24. The control device 24 controls the servo motor 22 based on the conveyance speed of the belt-shaped glass sheet G output from the conveyance amount detection device 100, and basically controls the traveling speed of the cutter 20, but the control device of the embodiment. 24 feedback-controls the servomotor 22 based on the squareness mentioned later, and changes the traveling speed of the cutter 20. FIG. That is, the travel distance of the cutter 20 that travels per pulse output from an encoder (not shown) of the transport amount detection device 100 is changed. As a result, a transverse line in a direction orthogonal to the conveying direction of the band-shaped glass plate G is processed on the surface of the band-shaped glass plate G.

  Further, the cutter 20 is provided so as to be movable up and down with respect to the belt-like glass plate G by an actuator such as an air cylinder. With this actuator, the cutter 20 starts to descend in advance at a position a predetermined amount before the cutting line start end in order to process a horizontal cutting line with a good cutting depth. Thereafter, the cutter 20 travels on the surface of the strip-shaped glass plate G along the guide frame 26 by the driving force of the servo motor 22 as shown by the solid line in FIG. Thereby, a transverse line is processed on the surface of the band-shaped glass plate G. After that, the cutter 20 is moved upward from the strip glass plate G by the actuator after passing a predetermined amount of the end of the cutting line, and then returned to the original cutting line standby position (position indicated by the solid line in FIG. 1) by the servo motor 22. Is done.

  On the other hand, the advancing / retreating means of the cutter 18 includes a servo motor 28 as shown in FIG. 3, and the servo motor 28 and the cutter 18 are attached to a guide frame 30 in FIG. It is attached at intervals. The guide frame 30 is installed across the roller conveyor 12 and in a direction orthogonal to the conveyance direction of the belt-shaped glass plate G. The ball screw device as the feeding means is provided in a hollow guide frame 30, and the cutter 18 advances and retreats in a horizontal slit 32 formed in the guide frame 30 by driving the ball screw device. It is slid through the moving means. Thereby, the position of the cutter 18 in the direction orthogonal to the conveyance direction of the band-shaped glass plate G is adjusted.

  The servo motor 28 shown in FIG. 3 moves the cutter 18 downward to generate a vertical cutting line on the belt-shaped glass plate G, and generates a pressing force on the belt-shaped glass plate G. The torque of the servo motor 28 is controlled by the control device 24 via the servo amplifier 34.

  Further, the control device 24 controls the advance / retreat movement timing of the cutter 18 by the servo motor 28 based on the transport amount (transport speed v) of the belt-like glass plate G obtained by the transport amount detection device 100 and also by the servo motor 22. The cutting line start time of the cutter 20 is controlled.

By the way, as shown in FIGS. 1 and 2, the slicing apparatus 10 according to the embodiment has an electronic camera (shape detection means) 42 disposed on the upstream side of the folding apparatus 52. The electronic camera 42 has been disconnected from the belt-like glass plate G, to image the glass plate G _A comprising cutting edges 54.

  In addition, as shown in FIG. 3, the cutting line processing apparatus 10 according to the embodiment has a perpendicularity of the cutting side portion 54 imaged by the electronic camera 42 with respect to the conveyance direction A (see FIGS. 1 and 2) of the strip glass plate G An arithmetic device (arithmetic unit) 44 is provided. The control device 24 has a function of changing the traveling speed of the cutter 20 by feedback-controlling the servo motor 22 so that the squareness calculated by the arithmetic device 44 falls within an allowable value.

  The electronic camera 42 is controlled by the control device 24 so as to capture an image of the cut side 54 at a timing when the cut side 54 shown in FIG. 1 passes below the electronic camera 42.

  The image signal including the cut side portion 54 imaged by the electronic camera 42 is binarized by the arithmetic unit 44 shown in FIG. 3, and only the image of the cut side portion 54 is extracted from the entire image. The computing device 44 calculates the squareness of the cutting edge 54 with respect to the conveyance direction A of the band-shaped glass sheet G based on the image of the cutting edge 54.

Figure 4 is an explanatory view showing a part of the glass plate G _A comprising cutting sides 54 captured by the electronic camera 42, an image of the cutting edge portion 54 which is captured by the electronic camera 42 of the electronic camera 42 It is displayed in the image area 48.

  Further, in FIG. 4, a predetermined cutting side 50 that intersects at right angles to the conveyance direction A of the belt-shaped glass plate G is indicated by a one-dot chain line, and an actual cutting side 54 is defined with respect to the predetermined cutting side 50. It is shown that it is inclined toward the conveying direction A side. This means that the conveyance speed of the glass strip G calculated by the conveyance amount detection device 100 is higher than the actual conveyance speed. That is, since the traveling speed of the cutter 20 is set according to the transport speed having an error calculated by the transport amount detection device 100, the traveling speed of the cutter 20 is set to a predetermined traveling speed (the cutting side portion 54 is in the transport direction). The actual cutting side 54 is inclined to the conveying direction A side with respect to the predetermined cutting side 50 in a relationship set at a higher speed than the speed orthogonal to A).

  Therefore, in order to keep the actual cutting edge 54 within the allowable value for the predetermined cutting edge 50, it is necessary to change the traveling speed of the cutter 20 to a low speed.

3 is based on the binarized image of the cut line 40, and the cutting start end 54A of the image of the cutting side 54 and the cutting start end 50A of the predetermined cutting side 50 as shown in FIG. Are matched with each other, the distance a (distance a parallel to the transport direction A) between the cutting end 54B of the image of the cutting side 54 and the cutting end 50B of the predetermined cutting side 50 is set to The calculation is based on the number of pixels existing between the cutting end 54B and the cutting end 50B of the predetermined cutting side 50. That is, since the size corresponding to one pixel of the electronic camera 42 is stored in the arithmetic device 44, the distance a can be calculated. Then, the arithmetic unit 44, based on the distance a and the width of the glass plate G _A L (known) the inclination angle θ of the cutting edge portion 54 with respect to a predetermined cutting edge portion 50, calculated from the equation tan .theta = a / L Then, information indicating the inclination angle θ is output to the control device 24 of FIG.

  The method of calculating the distance a based on the number of pixels is an example, and as another method, the distance a can be calculated using a glass plate shape measuring device disclosed in WO2010 / 095551. The shape measuring apparatus includes four electronic cameras arranged corresponding to the four corners of the glass plate, and storage means for storing relative coordinates of the four electronic cameras. Further, the shape measuring device measures the outer shape of the glass plate conveyed so as to pass through the shape measuring section.

  The measuring method by the shape measuring device includes the steps of determining whether the glass plate has reached the measurement section, and when it is determined that the glass plate has reached the measurement section, the four electrons Steps of capturing images including corner portions of the four corners of the glass plate that have reached the measurement section by the camera, and corners that are coordinate values from the image origins of the four corners of the glass plate based on the captured images A step of calculating post coordinates, a step of calculating the length dimension of each of the four sides of the glass plate based on the calculated corner post coordinates of the glass plate and the relative coordinates stored in the storage means; Based on the calculated corner post coordinates, the relative coordinates stored in the storage means, and the calculated length dimension. Te, and a, a step of computing the respective squareness four corners of the glass plate.

  The storage unit (not shown) of the control device 24 stores an allowable value of squareness. The control device 24 determines whether the input tilt angle θ or the calculated square angle is within the allowable value of the square angle, and if it is within the allowable value, the control for the servo motor 22 is not changed and the If it is outside the value, the control for the servo motor 22 is changed. That is, the control device 24 feedback-controls the servo motor 22 to change the traveling speed of the cutter 20 to a low speed so that the inclination angle θ falls within the allowable value of the squareness. For example, the control device 24 stores the traveling speed of the cutter 20 in accordance with the inclination angle of the cutting side portion 54 with respect to the predetermined cutting side portion 50, and becomes a traveling speed at which the inclination angle is theoretically 0 degrees. In this way, the traveling speed of the cutter 20 is changed by controlling the servo motor 22 to the high speed side or the low speed side. That is, the control device 24 changes the travel distance of the cutter 20 that travels per pulse output from an encoder (not shown) of the transport amount detection device 100.

  Thereby, according to the cutting line processing apparatus 10 of embodiment, since the cutting | disconnection edge part 54 is orthogonal to the conveyance direction A of the strip | belt-shaped glass plate G, the strip | belt-shaped glass plate G can be cut and processed with a dimensional accuracy.

  In addition, when the conveyance speed of the band-shaped glass plate G calculated by the conveyance amount detection device 100 is lower than the actual conveyance speed, the actual cutting side portion 54 is compared with the predetermined cutting side portion 50. It inclines in the direction opposite to the conveyance direction A side. In this case, the control device 24 feedback-controls the servo motor 22 to change the traveling speed of the cutter 20 so that the inclination angle θ at that time falls within the allowable value of the squareness.

  In the above embodiment, the traveling speed of the cutter 20 is feedback-controlled based on the perpendicularity of the cutting edge 54. However, the traveling speed of the cutter 20 is feedback-controlled based on the perpendicularity of the cutting line 40 before cutting. May be. Even in this case, the same effect can be obtained.

  FIG. 5 is a perspective view of a cutting line processing apparatus 10A that feedback-controls the traveling speed of the cutter 20 based on the perpendicularity of the cutting line 40. FIG. FIG. 6 is a plan view of the cutting line processing apparatus 10A shown in FIG. 5 and 6, the same or similar members as those in the cutting apparatus 10 shown in FIGS. 1 to 4 are denoted by the same reference numerals, and the description thereof is omitted.

  In the cutting line processing apparatus 10 </ b> A shown in FIGS. 5 and 6, an electronic camera 42 is installed above the downstream side of the cutter 20. The electronic camera 42 images a part of the strip-shaped glass plate G including the cut line 40 processed on the surface of the strip-shaped glass plate G by the cutter 20. The inclination angle of the cutting line 40 with respect to the conveyance direction A of the band-shaped glass plate G, and the feedback control method of the traveling speed of the cutter 20 by the control device 24 based on this inclination angle are the same as those of the cutting line processing apparatus 10 shown in FIGS. It is.

  That is, the calculation step of calculating the perpendicularity of the cut line 40 imaged by the electronic camera 42 with respect to the conveyance direction A of the belt-shaped glass plate G by the arithmetic device 44 (see FIG. 3), and the perpendicularity calculated by the arithmetic device 44 Is controlled by the control device 24 so that the traveling speed of the cutter 20 is changed.

  Therefore, in the cutting line processing apparatus 10A shown in FIGS. 5 and 6, since the cutting line 40 orthogonal to the conveyance direction A of the band-shaped glass plate G can be processed, the band-shaped glass plate G can be cut with high dimensional accuracy.

  In the embodiment, the electronic camera 42 is exemplified as the shape detection unit. The electronic camera 42 includes an image sensor such as a CCD or CMOS that images the belt-shaped glass plate G. The image processing unit that performs image processing on an image picked up by the image pickup device includes a calculation device 44. The image processing unit is configured by a microcomputer including, for example, a CPU, a RAM, and a ROM. In addition, the image processing unit performs image processing on an image captured by the image sensor, and specifies a location where the brightness of the image changes abruptly, so that the shape of the glass plate (the cutting edge portion 54 and the cutting line 40) and the size are determined. Is detected.

  Moreover, the following means are also illustrated as a shape detection means. For example, a laser displacement meter or a contact type linear gauge sensor can be used. The laser displacement meter can detect the edge of the cut glass plate and detect the shape of the glass plate as long as it is a sensor of a type that transmits the sheet-like laser light and detects the light amount of the light receiving part.

  Regarding the contact-type linear gauge sensor, when the sensor is brought into contact with the main surface (the surface on which the cut line 40 is processed) of the belt-like glass plate G, the sensor does not react when there is no cut line (groove) 40, but the cut line ( When there is a groove (groove) 40, the sensor reacts depending on the level difference of the cut line (groove) 40, so that the presence or absence of the cut line 40 can be detected, and the inclination angle of the cut line 40 with respect to the conveying direction A and the distance between the cut lines 40 and 40 can be detected.

  When the shape detection means is a sensor, it is difficult to detect the shape of a cut or cut-lined glass plate, so it is difficult to detect the shape of one glass plate. It is preferable to detect the four corners of the plate and detect the shape of the glass plate from the four corners. This is because in the case of the sensor, it is not captured by an area but by a point or a line. In other words, since the corner of the glass plate itself cannot be detected with the sheet-like laser light, two points on one side of the glass plate are detected using two sensors for one side of the glass plate. A straight line passing through two points is obtained, and a corner of the glass plate is obtained from a virtual intersection of two adjacent straight lines. Therefore, two sensors are required for one side of the glass plate, for a total of eight sensors.

  G ... strip glass plate, 10, 10A ... cutting line processing device, 12 ... roller conveyor, 14 ... vertical cutting line processing machine, 16 ... horizontal cutting line processing machine, 18 ... cutter, 20 ... cutter, 22 ... servo motor, 24 ... control device , 26 ... guide frame, 28 ... servo motor, 30 ... guide frame, 32 ... slit, 34 ... servo amplifier, 40 ... cutting line, 42 ... electronic camera, 44 ... arithmetic unit, 48 ... image area, 50 ... predetermined cutting edge , 52 ... folding device, 54 ... cutting edge, 100 ... transport amount detection device, 102 ... roller

Claims (6)

Cutting line processing means;
Driving means for processing the cutting line on the surface of the plate-like object by causing the cutting line processing means to run on the surface of the plate-like object in a direction inclined by a predetermined angle with respect to the conveying direction of the plate-like object being conveyed. When,
Cutting means for cutting the plate-like object along the cutting line;
A shape detecting means for detecting the shape of the plate-like object cut by the cutting means or the shape formed by the cut line of the plate-like object cut by the cutting line processing means;
Based on the shape of the plate-like object detected by the shape detection means or the shape formed by the cutting line of the plate-like object, the perpendicularity of the cutting edge of the plate-like object with respect to the conveying direction of the plate-like object, Or an arithmetic means for calculating the perpendicularity of the cut line of the plate-like object,
Control means for controlling the drive means so that the perpendicularity calculated by the calculation means falls within an allowable value to change the traveling speed of the slicing means;
A cutting apparatus for cutting a plate-like object characterized by comprising:   The shape detection means is an image pickup means for picking up an image of the plate-like object, and the calculation means is a perpendicularity of the cut side or the cut line based on image information of the plate-like object picked up by the image pickup means. The cutting apparatus for cutting a plate-like object according to claim 1, wherein A cutting line is machined on the surface of the plate-like object by causing the driving means to run on the surface of the plate-like object in a direction inclined by a predetermined angle with respect to the conveying direction of the plate-like object being conveyed. Cutting line processing step,
A cutting step of cutting the plate-like object along the cut line by a cutting means;
A shape detection step for detecting the shape of the plate-like object cut by the cutting means, or the shape formed by the cut line of the plate-like object cut by the cutting line processing means;
Based on the shape of the plate-like object detected by the shape detection step or the shape formed by the cutting line of the plate-like object, the perpendicularity of the cutting edge of the plate-like object with respect to the conveying direction of the plate-like object, Or a calculation step of calculating the perpendicularity of the cut line of the plate-like object,
A speed control step of changing the traveling speed of the slicing means by controlling the driving means by the control means so that the squareness calculated by the computing means falls within an allowable value;
A cutting method for a plate-like object comprising:   In the shape detection step, the plate-like object is imaged by an imaging unit, and in the calculation step, the perpendicularity of the cut side or the cut line is determined based on image information of the plate-like object imaged by the imaging unit. The cutting method of the plate-shaped object of Claim 3 to calculate.   An apparatus for producing a glass plate, comprising the plate-like material cutting device according to claim 1 or 2.   A method for producing a glass plate, comprising the method for cutting a plate-like material according to claim 3 or 4.

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